use base ten blocks. build each number. write the number ... … · fi ˇ˘ ˘ ˇ˙˘ ˙ l e s o n...
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Numbers and Operations in Base TenLesson
Hands-On Standards Math72
1
Use Base Ten Blocks. Build each number. Write the number.
1. Tens Ones
_____ tens _____ ones
__________
2. Tens Ones
_____ tens _____ ones
__________
Use Base Ten Blocks. Build each number. Draw the model. Write the number.
3. 17Tens Ones
_____ tens _____ ones
__________
4. 32Tens Ones
_____ tens _____ ones
__________
Write the number described.
5. 2 tens 5 ones _______ 6. 4 tens 2 ones _______
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73
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Hands-On Standards Math
Challenge! How would you build the number 80? Why is only one type of Base Ten Block used?
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Numbers and Operations in Base TenLesson
Hands-On Standards Math76
2
Use Base Ten Blocks. Build each number. Compare the numbers. Write the numbers with > or < between them.
1. Tens Ones Tens Ones
__________ __________ __________
Use Base Ten Blocks. Build each number. Draw the models. Write the numbers with > or < between them.
2. 24 32
Tens Ones Tens Ones
__________ __________ __________
Write > or < between the numbers.
3. 22 _____ 15 4. 51 _____ 65
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77
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Hands-On Standards Math
Challenge! What place value did you compare first with the numbers in the lesson? Why?
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Numbers and Operations in Base TenLesson
Hands-On Standards Math80
3
Use DecaDots. Write each number modeled. Write the three numbers that come next.
1.
______ ______ ______ _______
Next three numbers: ______ ______ ______.
Use DecaDots. Make the missing number. Draw the model. Write the numbers.
2.
_______ _______ _______
Missing number: _______
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81
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Hands-On Standards Math
Challenge! What numbers between 0 and 20 use two DecaDots tiles?
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Numbers and Operations in Base TenLesson
Hands-On Standards Math84
4
Use Base Ten Blocks. Build each number. Write the numbers and the sum.
1. Tens Ones Tens Ones
__________ + __________ = ___________
Use Base Ten Blocks. Build the numbers. Draw the models. Add.
2. 20 + 61 = _______
Tens Ones Tens Ones
Add.
3. 34
+ 10 _____
4. 44
+ 30 _____
5. 16
+ 20 _____
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85
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Hands-On Standards Math
Challenge! What if you want to add 24 and 35? Both numbers have some ones. How would you add?
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Numbers and Operations in Base TenLesson
Hands-On Standards Math88
5
Use Base Ten Blocks. Build each number. Add and regroup. Write the numbers and the sum.
1. Tens Ones Tens Ones
Can you exchange 10 ones for 1 ten? ______
__________ + __________ = ___________
Use Base Ten Blocks. Build the numbers. Draw the models. Add.
2. 36 + 5 = ________
Tens Ones Tens Ones
Add.
3. 17
+ 5 _____
4. 54
+ 7 _____
5. 17
+ 9 _____
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89
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Hands-On Standards Math
Challenge! How do you know when you have to exchange 10 ones for 1 ten?
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Numbers and Operations in Base TenLesson
Hands-On Standards Math92
6
Use Base Ten Blocks. Build each number. Write the numbers and the sum.
1. _____ + _____ = _____
0 10 20 30 40
Use Base Ten Blocks. Build the numbers. Draw the models. Subtract.
2. 35 – 10 = _____
0 10 20 30 40
3. 17 + 10 = _____ 4. 42 + 10 = _____
Subtract.
5. 29 – 10 = _____ 6. 58 – 10 = _____
Add.
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93
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Hands-On Standards Math
Challenge! Why do the ones not change when you find 10 more or 10 less?
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Numbers and Operations in Base TenLesson
Hands-On Standards Math96
7
Use Base Ten Blocks. Build each number. Write the numbers and the difference.
1. _____ – _____ = _____
0 10 20 30 40
Use Base Ten Blocks. Build the numbers. Draw the models. Subtract.
2. 30 – 30 = _____
0 10 20 30 40
Subtract.
3. 70 – 50 = _____
4. 90 – 40 = _____
5. 60 – 20 = _____
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97
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Hands-On Standards Math
Challenge! Does the number in the tens place or the ones place change when you subtract 20 from 50? Why?
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